Design intelligent AI agents with retrieval-augmented generation, memory components, and graph-based context integration

Key Features





Build next-gen AI systems using agent memory, semantic caches, and LangMem



Implement graph-based retrieval pipelines with ontologies and vector search



Create intelligent, self-improving AI agents with agentic memory architectures

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Book Description

Developing AI agents that remember, adapt, and reason over complex knowledge isn’t a distant vision anymore; it’s happening now with Retrieval-Augmented Generation (RAG). This second edition of the bestselling guide leads you to the forefront of agentic system design, showing you how to build intelligent, explainable, and context-aware applications powered by RAG pipelines.

You’ll master the building blocks of agentic memory, including semantic caches, procedural learning with LangMem, and the emerging CoALA framework for cognitive agents. You’ll also learn how to integrate GraphRAG with tools such as Neo4j to create deeply contextualized AI responses grounded in ontology-driven data.

This book walks you through real implementations of working, episodic, semantic, and procedural memory using vector stores, prompting strategies, and feedback loops to create systems that continuously learn and refine their behavior. With hands-on code and production-ready patterns, you’ll be ready to build advanced AI systems that not only generate answers but also learn, recall, and evolve.

Written by a seasoned AI educator and engineer, this book blends conceptual clarity with practical insight, offering both foundational knowledge and cutting-edge tools for modern AI development.

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What you will learn





Architect graph-powered RAG agents with ontology-driven knowledge bases



Build semantic caches to improve response speed and reduce hallucinations



Code memory pipelines for working, episodic, semantic, and procedural recall



Implement agentic learning using LangMem and prompt optimization strategies



Integrate retrieval, generation, and consolidation for self-improving agents



Design caching and memory schemas for scalable, adaptive AI systems



Use Neo4j, LangChain, and vector databases in production-ready RAG pipelines

Who this book is for

If you’re an AI engineer, data scientist, or developer building agent-based AI systems, this book will guide you with its deep coverage of retrieval-augmented generation, memory components, and intelligent prompting. With a basic understanding of Python and LLMs, you’ll be able to make the most of what this book offers.

Table of Contents





What is Retrieval-Augmented Generation?



Code Lab: An Entire RAG Pipeline



Practical Applications of RAG



Components of a RAG System



Managing Security in RAG Applications



Interfacing with RAG and Gradio



The Key Role Vectors and Vector Stores Play in RAG



Similarity Searching with Vectors



Evaluating RAG Quantitatively and with Visualizations



Key RAG Components in LangChain



Using LangChain to Get More from RAG



Combining RAG with the Power of AI Agents and LangGraph



Ontology-Based Knowledge Engineering for Graphs



Graph-Based RAG



Semantic Caches



Agentic Memory: Extending RAG with Stateful Intelligence



RAG-Based Agentic Memory in Code



Procedural Memory for RAG with LangMem



Advanced RAG with Complete Memory Integration